Remote Calibration - Fluke 8842A Instruction Manual

8842A
Instruction Manual
4. Select the "100Ω" output from the 5450A, and measure this value as in step 3.
5. Find and record the numerical difference between the values calculated in steps 3 and
6. Repeat steps 4 and 5 using the "1 kΩ" output from the 5450A; find and record the
7. Press the UUT's 2 WIRE kΩ button. This selects the Offset and Gain calibration
8. Select the "100Ω" output from the 5450A and calibrate the high point for the 200Ω
9. Select the "1 kΩ" output from the 5450A and calibrate the high point for the 2 kΩ
10. Calibrate the remaining ranges (steps D-G of Table 6-10) using the 5450A outputs.
11. Recalibrate the low point for each 2-wire ohms range using a shorting link (Pomona
12. Exit the calibration mode by pressing the CAL ENABLE switch.
13. Using the same configuration shown in Figure 6-4, verify that the UUT measures the
Only 4-wire ohm calibration is allowed in the 20 Ω range.
14. Cover the CAL ENABLE switch with a calibration certification sticker.

6-23. Remote Calibration

If the IEEE-488 Interface is installed, the 8842A can be calibrated under remote control.
Remote calibration is very similar to local (front-panel controlled) calibration. Table 6-14
shows the remote commands which correspond to the front panel features.To facilitate
remote calibration, there are some differences from local calibration:
6-20
readings. (In remote calibration, the averaged value can be stored in the controller.)
Record the value.
4. This value will be used as the variable input for calibrating the 200Ω range in 2-
wire ohms.
numerical difference between this and the "SHORT" measured in step 3. This value
will be used as the variable input for calibrating the 2 kΩ range in 2-wire ohms.
procedure for the 2-wire ohms function and prompts for zero input. Select the
"SHORT" from the 5450A, and calibrate all the zeros by pressing STORE.
range, entering the value computed in step 5 as a variable input.
range, entering the value computed in step 6 as a variable input.
MDP-S-0 or equivalent) across the UUT's HI and LO INPUT terminals.
same value (within 1 digit) in 2-wire ohms (using the offset feature to correct for
5450A floor error) as in 4-wire ohms. If the readings differ by more than 1 digit,
reenable the calibration mode and repeat steps 2 through 8.
Figure 6-4. Optimizing Use of the 5450A
NOTE
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